YSA
| Acronym | Definition |
|---|---|
| YSA | Youth Service America |
| YSA | Young Single Adult |
| YSA | Young Socialist Alliance (youth group) |
| YSA | Yleinen Suomalainen Asiasanasto (Finnish General Thesaurus) |
| YSA | Young Scientists of Australia |
| YSA | Youth Studies Australia (Peer-Reviewed Academic Journal, University of Tasmania) |
| YSA | Youth Savings Account |
| YSA | Youth South Africa (forum) |
| YSA | Your Secret Admirer |
| YSA | Youth Stake Activities (Roosevelt, UT) |